Commit: dced0518d92db056d6e61d35bd4b8fb0be994121
Author: Campbell Barton
Date:   Thu May 3 14:28:40 2018 +0200
Branches: blender2.8
https://developer.blender.org/rBdced0518d92db056d6e61d35bd4b8fb0be994121

Fix crash selecting envelope bone joint

===================================================================

M       source/blender/draw/intern/draw_armature.c
M       source/blender/editors/armature/armature_select.c

===================================================================

diff --git a/source/blender/draw/intern/draw_armature.c 
b/source/blender/draw/intern/draw_armature.c
index 3b61d21849e..7b29b213bec 100644
--- a/source/blender/draw/intern/draw_armature.c
+++ b/source/blender/draw/intern/draw_armature.c
@@ -1195,7 +1195,8 @@ static void draw_bone_envelope(
                rad_head = (pchan->parent && (boneflag & BONE_CONNECTED)) ? 
&pchan->parent->bone->rad_tail : &pchan->bone->rad_head;
        }
 
-       if ((boneflag & BONE_NO_DEFORM) == 0 &&
+       if ((select_id == -1) &&
+           (boneflag & BONE_NO_DEFORM) == 0 &&
            ((boneflag & BONE_SELECTED) || (eBone && (boneflag & (BONE_ROOTSEL 
| BONE_TIPSEL)))))
        {
                drw_shgroup_bone_envelope_distance(BONE_VAR(eBone, pchan, 
disp_mat), col_white, rad_head, rad_tail, distance);
diff --git a/source/blender/editors/armature/armature_select.c 
b/source/blender/editors/armature/armature_select.c
index af0483cf1dc..65f845ce34c 100644
--- a/source/blender/editors/armature/armature_select.c
+++ b/source/blender/editors/armature/armature_select.c
@@ -493,6 +493,8 @@ cache_end:
                                        Base *base = NULL;
                                        EditBone *ebone;
                                        base = 
ED_armature_base_and_ebone_from_select_buffer(bases, bases_len, hitresult, 
&ebone);
+                                       /* If this fails, selection code is 
setting the selection ID's incorrectly. */
+                                       BLI_assert(base && ebone);
 
                                        int dep;
                                        /* clicks on bone points get advantage 
*/

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